Finding the Third Proportional to 131,440.50 and 287,205

Step by Step Solution

1. Step 1: Write the proportion equation
   131,440.50 : 287,205 = 287,205 : x
2. Step 2: Convert to fraction form
   131,440.50/287,205 = 287,205/x
3. Step 3: Cross multiply
   131,440.50x = 287,205 × 287,205
4. Step 4: Simplify right side
   131,440.50x = 82,486,712,025
5. Step 5: Solve for x
   x = 82,486,712,025/131,440.50
6. Step 6: Final answer
   x = 627,559.33